Namespacing our Metadata keys?

[Bertrand Delacretaz]

Currently our metadata keys are simple strings, like in the DublinCore
interface:

  String FORMAT = "format";

I'd suggest prefixing those names to avoid collisions later on:

  String FORMAT = "org.dublincore.format";

WDYT?

If we agree, I volunteer to make the necessary changes (did I really
say this? ;-)

-Bertrand